Grab bucket



Feb. 12 1924. 1,4837)?! 5. E. ATHERTON GRAB sucxm Filed June a, 1.922 2Sheetsshut Feb. 12 1924;

S. E; ATHERTON GRAB BUCKET 2 Sheets-Sheet z Fi led June 5, 1922 fizz6762502 1 d v M Patented Feb. 12, 1924.

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STANLEY E. ATHERTON, 0F CLEVELAND, OHIO.

' GRAB BUCKET.

Application filed June3, 1922. Serial No. 565,642.

To all whom it may concern:

Be it known that I, STANLEY E. A'rHEnroN, a citizen of the UnitedStates, and resident of Cleveland, in the county of Guyahoga and Stateof Ohio, have invented certain new and useful Improvements in GrabBuckets, of which I hereby declare the following to be a full, clear,and exact description, such as will enable others skilled in the art towhich it appertains to make and use the same. a p

The objects of the invention are to provide a grab or clam shell bucketof thetwo line type, one line being employed'for holding up the bucketand the other for closing the same. The invention particularly relatesto a. bucketin which an oscillating lever is secured to a shaft which ispositioned above the bucket shaft, and used in connec tion with theclosing rope to give positive closing action and increased closing powerin the operation of the scoop members.

The particular objects attained by the construction of this bucket areto locate the sheaves of the lever in such position that they will notbecome fouled with the material of the load during the operation of thebucket, and to give more perfect control of the operation thereof and toobtain increased smoothness of action and great are in turn pivoted uponthe bucket shaft.

The invention includes a pair of scoop members having their inner andupper edges ivoted upon a common bucket shaft, and

having bail arms connected to their outer and upper edges, with anelevated head, in spaced positions thereon.

It includes means for giving comparative rigidity to the head to preventit from collapsing, which preferably includes an extension of one set ofbail arms, and link connections between these extensions and the pivotalpoints of the other set of bail arms in said head.

It includes a rocking lever and upright supporting members mountedon'the bucket shaft to which the lever is pivoted, one end of the leverbeing pivoted upon one set of bail arms and fulcruming thereon, andblock and tackle mechanism operatively connected with one end of saidlever and with a sheave or point at the upper end of the bucket andpreferably adjacent to one end of said head, by means of which the leveris operated.

The invention is hereinafter described, exemplified in the accompanyingdrawings and specifically pointed out in the claims.

In the accompanying drawings Fig. 1 is a side elevation of the bucketshowing the scoop members in the open position, Fig. 2 is a similar viewshowing the scoop members closed, Fig. 3 is an end elevation showing thescoop members in the closed position.

In these views A, A, are the scoop members pivoted together at theirupper and inner edges by means of the bucket shaft B.

C, C, C, C, are pairs of bail arms which are pivotally connected attheir lower ends at D, D, with the outer and upper edges of the scoopmembers, and are connected in spaced positions bymeans of pins or boltsE, E, with the rigid head F. This head is prevented from tilting in anydirection while the bucket is in operation, by means of the extensionsG, G, from one setof bail arms and the link or links H, H, pivotedthereto and to the'bolt or pin E to which the other set of bail arms isattached.

The extensions G, G, are preferably curved to shorten the links H, II,so as to prevent too much movement of the parts, but this structurewhile preventing the collapse of thehead and its tilting in anydirection, does permit a slight yielding movement of the parts,sufiicient to prevent them from being torn apart when the scoop membersare closing upon the load.

The closing lever is composed of arms J, and K, pivotally mounted upon ashaft L secured intermediate of its ends, in the arms M, M, abovethebucket shaft B.

The shaft L is elevated upon the arms M, M, which are pivoted on thebucket shaft.

over an idler O pivoted at one side of the head F ,(and the pivotalpoint may be on the shaft of the link 0) passes over a sheave P pivotedin the arm, and thence passing over a sheave Q in or adjacent to thehead is dead ended or terminates in the arm at R.

The number of sheaves may be increased and the number of parts of therope connecting them may be increased to four or five, and the rope maybe dead ended in the head or arm as desired, if more power is desired,but the form of lever employed is as powerful as any known, that of alever of the second class, which operates quickly and powerfully toclose the scoop members together. S, is the holding rope.

I-Iaving described the invention what I claim as new and desire tosecure by Letters Patent is:

1. In a clam shell bucket, the combination with a bucket shaft, of Scoopmembers pivoted thereon at their adjacent inner and upper edges, a head,sets of bail arms connec'ting the respective outer ends of said scoopmembers with said head, a pivot shaft secured adjacent to said bucketshaft and above the same, a. closing lever pivotally mountedintermediate of its ends upon said 7 pivot shaft, one end of said leverbeing fulcrumed upon one set of bail, arms, and block and tacklemechanism operatively connected with the other end of said lever and.with a point in the upper part of said bucket for operating saidclosing lever.

2. In a clamshell bucket, the combination with a bucket shaft, of scoopmembers pivoted thereon at their adjacent inner and upper edges, a head,sets-of bail arms connecting the respective outer ends of said scoopmembers with said head, a pivot shaft secured adjacent to said bucketshaft and above the same, a closing lever pivotally mounted intermediateof its ends upon said pivot shaft, one end of said lever being fulcrumedupon one set of bail arms, and block and tackle mechanism operativelyconnected with the other end of said lever and with a point in the upperpart of said bucket for operating said closing lever, and

a separate support pivoted on said bucket shaft on which said pivotshaft is secured.

.3. In a clamshell bucket, the combination with a bucket shaft, scoopmembers pivoted together and to said shaft, and a head and sets of bailarms connecting said scoop members at their outer ends with said head,of a lever of the second class, pivoted above said bucket shaft,supporting arms upon said bucket shaft for said pivot shaft, a fulcrumpoint for one end of said lever in one set of bail arms, and block andtackle mechanism operatively connecting said lever with a point adjacentto one end of said head.

4:. In a clamshell bucket, in combination, a pair of scoop memberspivoted together at their inner and upper edges, an elevated head, a setof bail arms pivoted upon the outer ends of said scoop members andsecured to said head in spaced positions thereon, one set of bail armsextended above said head, and a link connection between the outer endsof said bail arm extensions and the securing point of the other set ofbail arms in said head.

5. In a clamshell bucket, in combination, a pair of scoop memberspivoted together at their inner and upper edges, an elevated head, a setof bail arms pivoted upon the outer ends of said scoop members andsecured to said head in spaced positions thereon, one set of bail armsextended above said head, and a link connection between the outer endsof said bail arm extensions and the securing points of the other set ofbail arms in said head, a transverse shaft positioned in said bucketabove the pivotal connecting point of said scoop members, and a leverpivoted on said transverse shaft and fulcrumed upon one set of bailarms, and block and tackle mechanism operatively connecting said leverwith the upper part of said bucket.

In testimony whereof, I hereunto set my hand this 31st day of May 1922.

STANLEY E. ATHERTON.

In presence of- WM. M. MONROE, MARGARET C. LOCKER. I

